I'm pretty sure that by detaining a random selection of people on a typical city street they will be disrupting working people. Sure it doesn't matter if they're working or not - the JSO protestors have no idea who the random people are that they're detaining or what they're doing that day, whether they're going to a hospital, a funeral, going to a job, off to play golf or just going around town aimlessly. That's the point - how is detaining a select few randoms on a street supposed to be comparable to disrupting a sporting event, live TV program, oil refinery or whatever else might help them exert pressure or raise their consciousness or whatever? If it was you could pop out and stop Maureen and Chris from entering the Dulwich Picture Gallery, or make sure Jeff, Pete and Annabelle can't get out of Tesco until 15:30. A bit of swearing, upload to Instagram and jobs a good'un.